Connecter housing



June 14, 1.932. G. M. WRIGHT ET AL 1,352,876

CONNECTER HOUSING Filed Nov. 23. 1928 INVENTOR GEORGE MAURICE WRIGHT Ax NEY Patented UNITED STATES,

I PATENT orrlcs GEORGE MAURICE WEIGHT, GREAT BADDOW, CHEI-IKSFO'RD, AND SIDNEY IBEBTRAI SMITH, OI GORDON VILLE, GHELMSFOBD, ENGLAND, ASSIGNORS TO RADIO OORROBA- TION' OF AMERICA, A. CORPORATION OFKDELLWABE cormnc'rnn nousme Application filed November 88, 1828, Serial No.

This invention relates to ignition systems for use in internal combustion engines and has for its principal object to provide an improved ignition system which shall be effectively screened and thereby substantially prevented from interfering with radio apparatus ,which may be located in the neighbourhoodof the said system. While not limited to its application thereto, the inventionis particu-1 larly adapted for use on aircraft, where, as

iswell known, the interference with radio apparatus by the engine ignition system presents a considerable problem.

-In a properly constructed ignition system to housed on aircraft the ignition leads and sparking plugs must bescreened in such a manner as to enclose all electromagnetic and electrostaticdisturbances set up thereby in the operation thereof; Furthermore, such ignition systems and screemng therefor must be constructed and arranged 1n such a manner as to be waterproof, otherwise water is liable to run into the sparking plug screen to cal insulation, the arrangement and may short-circuit the plug. The provide ascreening'system which electriy completely screens the ignition system and which is weatherproof. 7

According to this inventionan ignition screening system comprises one, or more weatherproof metal screens for the sparking lug or plu and/or magneto or the equivalent thereo and a leador leadslcomprising a metal screeningcovered b weatherproof being such that i the connection between a screening and a plu and/or magneto screen is made within sai screen'into which the lead enters in .a waterti ht'man'ner. a

e invention is illustrated in the accompan 81 g drawin in which Figure 1 shows in section an Figure 2 in plan one form of construction, while Figures 3, 4 and 5 show in sectional elevation, half sect onal end ele- Y vation and struction; a p I Referring to :Figures -1 and'2, an ignltion lead comprises a central conductor 1, insulation 2 1 metal screening braid 3 (for example,

copper) and outer weatherproof mplan, respectively, a modifiedconpresent invention has for, its object 321,:102, and in Great mam December a, 1927.

sulation 4. 5 is a sparking plug which is encased within a screen 6 which will be re- ,ferred to as the body member, and which is earthed and held in place as shown by threading at its base onto the body of the spark plug. The ignition lead enters the.

screen {5 at its top through a watertightljoint comprising a removable gland housin 7 ,'a union nut 8, a land nut 9 and a glan ring 10 The glan earth bonding ring, and is connected, as shown, to the braiding 3 which is bared inside the screen 6. The ignition conductor 1 ring 10 also serves, as anscreen from the side through sponding to parts shown in Figures 1 and 2 are indicated by like reference numerals.

12 is a detachable base member threaded on the s ark plug base and 13 a copper washer. The ody member is retained in position on the base member 6 by means of a union nut 14.

To completely enclose the spark plug yet to permit easy access thereto, a cap ni is threaded into the body member '6. r

In applying the invention to an ignition ember 15 I system, a suitable screen should be provided over. the magneto and the ignition conductor or conductors led thereto through a watertight gland arrangement similar to those employe in the sparking plug screen or screens.

' Having now an described and illustrated our invention, we claim:

1. Metallic shielding apparatus for preventing electrical disturbances from being radiated from electrical conductor connectera, including, a metallic cup shaped base member connected; with one of sg id conductors and supported thereby, said base member being enlarged-stile ,free end'and terminatin in a flange, a metallic shell-like body member adapted to be seated on said base member, threaded means for retaining said body member on said base member, a 5 closure member threaded to said body member, and means comprising a waterroof joint in said closure member for permlttin another of said conductors to be connecte with said first named conductor. 2. Metallic shielding for electrical conductor connections comprising, a metallic cylindrical shaped base member threaded to one of said conductor members, said base member being enlarged at the free end and terminating in a flange, a cylindrical metallic body member adapted to be seated on said flange, threaded means for retaining said body member on said flange, a metallic closure member threaded'in said body member, and means for permitting electrical connection to be made betweenanother conductor and said first named conductor includin a water-proof joint in said closure mem er, said joint comprising a water-proof gland .throu h which said other conductor may b passe 3. A metallic shielding for electrical conductor connections comprising, a hollow shell-like member threaded to one of said 3 conductors, said shell-like member fianging upwardly and having heat radiating corrugations thereon, an annulus shaped member adapted to fit into the open end of said shelllike member, said annulus member having an opening through which another conductor may be passed, compressible material interposed between said conductor and said annulus shaped member, a threaded member for retaining said annulus shaped member in 40 said shell-like member, and additional threaded means for applying pressure between said compressible substance and said pthe: conductor to produce a water-proof 30m GEORGE MAURICE WRIGHT." SIDNEY BERTRAM SMITH. 

